Fastener-making machine.



No. 668,395. Patented Feb. I9, IQYOI. J. D. STIBCKLER.

FASTENEB MAKING MACHINE.

(Application filed May 1 1900.).

(No Model.)

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AT T more JOHN D. STIROKLER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THECONSOLIDATED FASTENER COMPANY, OF PORTLAND, MAINE.

FASTENER-IVIAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 668,395, dated February19, 1901.

Application filed May 1, 1900. Serial No. 15,152. (N model-J To all whomit may concern:

Be it known that I, JOHN D. STIRCKLER, a citizen of the United States,residing at Boston, in the county of Suffolk and Commonwealth of Massachusetts, (post-office address 468 Summer street, East Boston,) haveinvented a new and useful Improvement in Fastener-Making Machines, ofwhich the following is a full specification.

My invention relates to machines for forming a contracted neck on theeyelet or stud of the fastener; and it consists of certain details ofconstruction hereinafter shown and described.

In the drawings I have shown my machine for forming the contracted neckon the ball member of the fastener.

Figure 1 shows a vertical section of the upper and lower dies of mymachine with the eyelet or stud held on the lower die before beingoperated upon. Fig. 2 shows the same after the dies have been broughttogether, forming a neck on the stud. Fig. 3 shows the stud before theneck is formed in it, and Fig. 4 the same provided with a neck. Fig. 5shows a plan of the under side of the upper die of my machine.

Referring to the drawings, the upper die A consists of a hollow sleeve0, suitably held in the plunger of my machine and having at its lowerend a conical concavity.

Inserted in the inside of the sleeve C is the collet-piece D, which isconstantly urged outward by the spiral spring E, between this end andthe adjusting-screw c, screwed into the upper end of the sleeve 0.Although urged outward, the outward motion of this colletpiece D islimited by the stop-pin 11 playing in the slot c of the sleeve C.

The lower end of the collet-piece D flares outward into a conecorresponding to the conical concavity in the end of the sleeve 0. Thelower end of the piece D is also kerfed, so that it is really formed ofa number of spring-fingers, which may be contracted, and, as will beseen in the drawings, these fingers will be contracted when the piece Dis thrust back into the sleeve C against the action of the spring E.

In the lower end of the piece D is cut the cavity 01', large enough toadmit the stud X, as shown in Fig. 3, and so shaped that when thefingers of the piece D are contracted this cavity d will have just theshape of the stud with the neck at.

The stud X is held on the lower die B, having the teat 17, supportingthe inside of the stud in height, and having a diameter small enough toallow it to be withdrawn after the neck as is formed.

By means of the spring E and the stop 61 I am enabled to adjust mymachine very nicely in order to insure an even and uniform product.

As will be readily understood, the stud :1; having been placed on theteat b, the plunger is lowered until the lower face of the colletpiece Dcontacts with the flange of the stud. Further downward movement of thesleeve then acts on the spring E, thereby practically storing powerwhile the collet-piece is being moved to shape the stud. The arms of theoollet being arranged to spread automatically when under the action ofthe conical concavity, it will be seen that upon the return movement ofthe sleeve C (which is aided by the stored power of the spring) thespring E will hold the collet-piece against the flange of the stud untilsaid piece has spread to a point where it can be raised without tendingto take the stud from on": its teat.

I claim 1. In a fastener-making machine, a die consisting of a sleeve Chaving a conical concavity, the piece D having an external conical endand neck provided with a central forming-concavity in combination with aspring E andstop 01 substantially as shown and described.

2. In a fastener-making machine, the combination of a die consisting ofa plunger, a sleeve mounted therein, said sleeve having a conicalconcavity at its lower end, a colletpiece mounted to have a slidingmovement in said sleeve, the lower end of said piece having an externalcone-shaped face adapted to be acted upon by said conical concavity tocompress the piece, a central forming-cavity formed at the lower end ofsaid piece, a spring for normally holding the lower end of saidcollet-pieoe in an inoperative position; a stop, In Witness whereof Ihave hereunto set my and means for forming an abutment against hand.which the lower face of said collet-piece eontaets, thereby storingpower during the for- 5 ward movement of the plunger for retainingWitnesses:

said piece against a return movement until WM. B. H. DOWSE, in aposition to return.

JOHN D. STIRCKLER.

, A. H. FLANNERY.

